[close #343]fix cdc residue metrics

cdc/cdc/capture/capture.go

@@ -234,6 +234,7 @@ func (c *Capture) run(stdCtx context.Context) error {
 		// (recoverable errors are intercepted in the processor tick)
 		// so we should also stop the processor and let capture restart or exit
 		processorErr = c.runEtcdWorker(ctx, c.processorManager, globalState, processorFlushInterval)
+		c.processorManager.SyncClose()
 		log.Info("the processor routine has exited", zap.Error(processorErr))
 	}()
 	wg.Add(1)
@@ -326,6 +327,7 @@ func (c *Capture) campaignOwner(ctx cdcContext.Context) error {
 		err = c.runEtcdWorker(ownerCtx, owner, orchestrator.NewGlobalState(), ownerFlushInterval)
 		c.setOwner(nil)
 		log.Info("run owner exited", zap.Error(err))
+		owner.CloseAllChangefeeds(ownerCtx)
 
 		// TODO: fix invalid resign
 		// When exiting normally, cancel will be called to make `owner routine`

cdc/cdc/owner/owner.go

@@ -188,17 +188,23 @@ func (o *Owner) Tick(stdCtx context.Context, rawState orchestrator.ReactorState)
 		}
 	}
 	if atomic.LoadInt32(&o.closed) != 0 {
-		for changefeedID, cfReactor := range o.changefeeds {
-			ctx = cdcContext.WithChangefeedVars(ctx, &cdcContext.ChangefeedVars{
-				ID: changefeedID,
-			})
-			cfReactor.Close(ctx)
-		}
+		o.CloseAllChangefeeds(ctx)
 		return state, cerror.ErrReactorFinished.GenWithStackByArgs()
 	}
 	return state, nil
 }
 
+// CloseAllCaptures close all changefeeds.
+// Note: Please be careful to call this method!
+func (o *Owner) CloseAllChangefeeds(ctx cdcContext.Context) {
+	for changefeedID, cfReactor := range o.changefeeds {
+		ctx = cdcContext.WithChangefeedVars(ctx, &cdcContext.ChangefeedVars{
+			ID: changefeedID,
+		})
+		cfReactor.Close(ctx)
+	}
+}
+
 // EnqueueJob enqueues an admin job into an internal queue, and the Owner will handle the job in the next tick
 func (o *Owner) EnqueueJob(adminJob model.AdminJob) {
 	o.pushOwnerJob(&ownerJob{

cdc/cdc/processor/manager.go

@@ -155,6 +155,14 @@ func (m *Manager) sendCommand(tp commandTp, payload interface{}) chan struct{} {
 	return cmd.done
 }
 
+// SyncClose closes all processors
+// Note: This method must not be called with `Tick`!!!
+func (m *Manager) SyncClose() {
+	for changefeedID := range m.processors {
+		m.closeProcessor(changefeedID)
+	}
+}
+
 func (m *Manager) handleCommand() error {
 	var cmd *command
 	select {

cdc/cdc/processor/processor.go

@@ -649,6 +649,10 @@ func (p *processor) removeKeySpan(keyspan keyspanpipeline.KeySpanPipeline, keysp
 }
 
 func (p *processor) Close() error {
+	if !p.initialized {
+		return nil
+	}
+
 	for _, tbl := range p.keyspans {
 		tbl.Cancel()
 	}
@@ -675,6 +679,7 @@ func (p *processor) Close() error {
 		}
 	}
 
+	p.initialized = false
 	return nil
 }
 

cdc/cdc/processor/processor_test.go

@@ -42,7 +42,10 @@ func newProcessor4Test(
 	createKeySpanPipeline func(ctx cdcContext.Context, keyspanID model.KeySpanID, replicaInfo *model.KeySpanReplicaInfo) (keyspanpipeline.KeySpanPipeline, error),
 ) *processor {
 	p := newProcessor(ctx)
-	p.lazyInit = func(ctx cdcContext.Context) error { return nil }
+	p.lazyInit = func(ctx cdcContext.Context) error {
+		p.initialized = true
+		return nil
+	}
 	p.sinkManager = &sink.Manager{}
 	p.createKeySpanPipeline = createKeySpanPipeline
 	return p